Interlocking friction-clutch.



No. 862,116. PATENTED JULY 30, 1907.

F. B. SMITH.

INTERLOCKING FRICTION CLUTCH.

APPLICATION FILED OOT.26, 1906.

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FIG I IN VE IV TOR A TTURNEYS.

UNITED STATES PATENT ossron.

FRANK B. SMITH, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE BARBER ASPHALT PAVING COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A- CORPORATION OF WEST VIRGINIA.

INTERLOCKING FRICTION-CLUTCH.

No. 862,1 1e.

Specification of Letters Patent.

Patented July 30, 1907.

Application filed October 26,1906. Serial to. 340,620.

To all whom it may concern:

Be it known that I, FRANK B. SMITH, a citizen of the United States, residing at The N ormandie, Thirtysixth and Chestnut streets, in the city of,Philadelphia,

county of Philadelphia, and State. of Pennsylvania,

have invented certain new and'useful Improvements in Interlocking Friction-Clutches, whereof the following is a-specif lcation, reference being had to the accompanying drawings.

My invention relates to an interlocking friction clutch, that is to say, a combined friction and toothed clutch by which the engagement of the clutch is effected first frictionally and then by interlocking the toothglutch. I

In the accompanying drawings, I have illustrated a practicaLconstruction of clutch which embodies the principles of my invention, and in which:

Figure I is an end elevation-with parts broken away; and Fig. II, is a longitudinal section taken on the line II, II, of Fig. 1, showing the clutch as it .appears when coupled.

In the drawings, 1, is the driving shaft to which is secured the fly wheel or disk 2, having'a smooth face or frictional surface upon its web 3. p

4, is a splined shaft which is to be driven: Slidably mounted on said driven shaft is a disk 5, provided with, a series of radial openings 6, extending around said disk in which, are placed inserts 7, of friction-resisting material, such as hard wood, which may be readily re-.

moved and replaced when worn.away. These inserts are thicker than the surrounding portions of the disk so that they receive the pressure exerted to clamp the clutch into frictional engagement and are thereby firmly pressed against the web 3, of the disk 2. 'A hub 8, extends rearwardly from said disk 5, and is provided with a bearing for an annulus 9, which runs freely on said bearing. The rear face of said annulus'is provided with .teeth 10, which are adapted to mesh with similar teeth 11, onthe front face of a sleeve 12, which sleeve is also slidably mounted on said driven shaft 4. Mounted to rotate freely onsaid sleeve 12, is a collar 13, and mounted loosely on this collar is a thrust collar 14, by means of which the clutch is shifted into engagement or disengagement. "Passing through the fly wheel or disk 2, and annulus I 9, but beyondv the periphery of the disk 5, are several driving pins or bolts 15;in the present instance three an angle lever 16, having sufficient play between the pin and the hole in the lever to permit a freerocking motion of said lever as it is clamped against said annulus.

Pivoted to one end of each angle lever is a pair of links 17, which links are also pivoted to the rotatable collar 13. The relation of the centers of the pivots of said links 17 in the angle levers 16, .and collars 13, is such that when the collar 13, is moved toward the driv-' ing member, the left hand end of each of the angle levers is forced. outwards and the other endiis forced against the annulus until the pivots come into vertical alinement, at which time the pressure against the annulus is at its maximum. At this point the teeth 10, 11, are just ready to become engaged and further movement of the collar 13, in the same direction effects looking engagement of said teeth. Thus it will be seen that .the clutch is first frictionally engaged to its fullest extent before the locking action takes place.

Surrounding the driving pins 15, are coiled springs 18,- placed between the web 3, of the fly wheel or disk 2, and the inner face of the annulus for the purpose of forcing said annulus away from the intermediate disk 5, when the pressure applied through the angle levers 16, has been removed, thus freeing the inserts 7, from the frictional face of the web 3.

The operation is as follows :-As shown in the drawing the clutches are in engagement. By moving the collar 14, in the direction indicated by the arrow on the drawing, the collar 13, together with the toothed sleeve 12, are moved in the same direction, and the links 17, are moved past the center and force the angle levers l6, outward and against the annulus 9, with a toggle action, thus allowing the teeth 10, and 11, to become disengaged while pressure is still maintained on the frictional clutch. It will therefore be noted that as the links 17, reach the vertical position, the clutch is still fric'tionally engaged, and to its fullest extent, whereas the teeth are just freed from engagement. The further movement of said collar 14, in the same direction, causes the links 17, to draw in theadjacent ends of the angle levers l6, and thereby release the pressure from the annulus 9. Under the action of the springs 18, the annulus 9, is forced away from the friction disk 5, and

the friction clutch is thus freed. To set the clutches the collar 14, is forced in the opposite direction to that indicated'above, and the frictional clutch is set first and then the positive locking clutch is set in the reverse manner to that described above.

I claim:

1. clutch one member of which comprises a disk and an annulus with its flat surface in opposition thereto, said annulus being also provided with teeth; and another member which comprises a disk received between the opgether whereby there is occasioned frictional contact between their opposing surfaces and the surfaces of the blocks carried by the other disk and toothed engagement between said annulus and forcing means. v l

2.- A clutch having one member which comprises a disk and an annulus with its flat surface in opposition thereto; another member which comprises a disk slidably mounted upon a shaft and having its surfaces received between the opposing surfaces of the first mentioned disk and annulus; a collar also'sliding in relation to said shaft, and capable of toothed engagement with the annulus; and connections whereby the shaftwise motion of the collar initially forces together the disk and the annulus with frictional engagement of the disk which is between them, and subsequently eifects toothed engagement of the collar with said annulus.

3. A clutch having one member which comprises a disk and an annulus with its flat surface in opposition thereto another member which comprises a disk slidably mounted upon a shaft and having its surfaces received between the opposing surfaces of the first mentioned disk and annulus; a collar also sliding in relationto said shaft, and capable of toothedengagement with the annulus; and connections whereby the shaftwlse motion of the collar initially forces together the disk and the annulus with frictionaheug'a'gement of the disk which is between them,-and subsequently effects toothed engagement of the collar with said annulus, said connections including a plurality of angular levers by the motion of which the disk and annulus are forced together against the resistance of interposed springs and a corresponding series of links wherebysaid levers areconnected with the collar. I

4. A clutch having one member which comprises a disk and an annulus with its flat surface in opposition thereto; another member which comprises a disk slidably mounted upon a shaft and having its surfaces received between the opposing surfaces of the first mentioned disk and annulus; a collar also sliding in relation to said shaft, and capable of toothed engagement with the annulus; and connections whereby the shaftwise motion of the collar initially forces together the disk and the annulus with frictional engagement of the disk which is between them, and subsequently effects'toothed engagement of the collar with said annulus, said connections including a plurality of angular levers by the motion of which the disk and annulus areforced together against the resistance of interposed springs and a corresponding series of links whereby said leversare cpnnected with the collar, the relative position of the ends of said connecting links being such that the initial motion effects frictional engagement between the members to the fullest extent possible,- prior-to the effecting of the interlocking engagement.

5. A clutch of'wh'ich'the driving member consists of a shaft carrying a disk with a toothed annulus rotating with it, but with the capacity to be moved towards or away-from said disk; and a driven member which com prises a shaft having adlsk siidably mounted thereon which is received between the opposing surfaces of the driving disk and its annulus; a sleeve slidably mounted on said shaft and having teeth capable of engagement with said toothed annulus; and a collar freely. mounted upon said driven shaft with means whereby the initial shaftwise motion of said collar forces together the disk and annulus of the driving member to effect frictional engagement with the disk mounted on the driven member while the further movement of the collarin the same direction forces said sleeve and annulus into locking engagement.

6. A clutch having one member which comprises a disk;

a second disk slidably mounted upon a shaft and provided with replaceable inserts; an annulus loosely mounted upon a hub on said second disk and extending beyond said inserts; and means for forcing said annulus sliaftwise to press the inserts into frictional engagement with said first mentioned disk.

7. Aclutch comprising a driving member; a disk provided with a hub and having replaceable inserts; a second disk loosely mounted upon said hub and provided with teeth; a sleeve also provided with teeth for engaging the teeth on said hub; and means for forcing said sleeve and disks longitudinally to produce frictional engagement between said driving member and inserts and locking engagement of said teeth. I

8. A clutch comprising a driving member; a disk provided with means for frictional engagement with said ydriving member; an annulus loosely mounted upon an extension of said disk and adapted to force said disk longitudinally against said driving member, said annulus being provided with teeth; a sleeve slidably mounted on a shaft and provided with teeth; a collar loosely mounted on said first sleeve; and means for first moving said disk .into frictional engagement with said driving member and then forcing said toothed sleeve and annulus into locking engagement. 7

9. A clutch having one member which comprises a disk; a second disk slidably mounted upon a shaft; an annulus mounted upon said second disk; means for forcing said annulus against said second disk to force the latter into frictional engagement with said first mentioned disk; and means for producing locking engagement between said second disk and forcing means.

-, 10. A clutch comprising a driving member; a friction disk mounted upon a shaft; :1 tootheddisk mounted loosely a on said friction disk; a" toothed sleeve mounted on said shaft; a collar mounted upon said toothed sleeve and means whereby shaftwlse motion of said collar clamps said friction disk between said toothed disk and driving member and locks said toothed disk and sleeve.

11. A clutch comprising a driving member, provided with pins; a friction disk slidably mountedon a shaft; an annulus n1 ounted to rotate oh said friction disk and slide overthe pins in the driving member; an angular lever loosely mounted on each'of said pins and lhavlng rocking,

engagement with said annulus; a collar mounted on said shaft; and links connecting said collar and angular levers, wherebyupon the shaftwise movement of said collar, the friction disk'is clamped between the driving member and the'annulus.

12. A clutch comprising a driving member provided with plus; a clamping disk provided with'tceth a friction disk between 'said driving member and clamping disk, said clamping disk having holes which register with the driving pins; an angular lever loosely mounted on each of said pins and having rockingengagement with the clamping disk; a sleeve slid'ably mounted upon a shaft and provided with teeth adapted to mesh with those on the clamping disk, a collar rotatably mounted on the sleeve; links connecting said collar with each of said angular levers, whereby upon moving the collar longitudinally of the shaft, the friction disk is first clamped between the drivlng member and the clamping disk and then the toothed whereby when the-toggle is moved in one direction past the center, the friction disk is first clamped and then the toothed annulus and sleeve are locked, and when the tag le is moved in the opposite direction past the center, the

' parts are first unlocked'and then the friction disk is released.

14. In combination, a disk; an opposing annulus; an intermediatedisk adapted to be clamped between said annulus and first mentioned disk; a sleeve mounted on a shaft, and adapted to be locked to said annulus; and means for clamping said friction disk and for locking said sleeve and annulus.

15. In combination, a disk; an opposing an'nulus; an intermediate friction disk adapted to be clamped between said disk and annulus; a-sleeve provided with means whereby it may be positively locked with said annulus; and multiplying leverage between said sleeve and annulus,

whereby the friction disk is first clamped between said first- 10 mentioned disk and said annulus, upon first moving said sleeve, and upon the further movement of said sleeve it is positively locked with said annulus.

In testimony whereof, I have hereunto signed my name, at Philadelphia, in the State of Pennsylvania, this twentysecond day of October, 1906.

FRANK B. SMITH.

Witnesses JAMES H. BELL, E. L. FULLERTON. 

